21" Front Wheel?
 

Has anyone looked into a 21" front wheel conversion for the RX4?

Not me..... why would you want to ?
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Yah 21" tires on a dirt bike are great but their 1/2 the weight or less .... I don't think you would get much benefit from a 21" wheel on the front on a RX4 unless you stripped it down to the bare bike and took off 120lbs of crap they put on it....
yah I think the bike would have enough power to be a real hoot in the dirt but
you'd have to do something about the 450lbs !
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Bob....